Nuclear Chemistry

What is an alpha particle?

• a charged electron that is emitted during certain types of radioactive decay

• particles released during electromagnetic radition

• positively charged particle composed of two neutrons and two protons

• negatively charged particle that orbits the nucleus

Tags

NGSS.HS-PS1-8

What is a beta particle?

• created when a neutron changes into a proton and an electron

• created when a proton changes into a neutron and an electron

• composed of two protons and two neutrons

• negatively charged nucleus

Tags

NGSS.HS-PS1-8

What is a nuclear chain reaction?

• high voltage electricity released from an alpha particle

• process by which nuclei combine at extremely high temperaturest o create heavier nuclei; energy is released during this process

• a continuous series of nuclei merging together

• a continuous series of nuclear fission reactions

What is nuclear fission?

• the process in which light nuclei combine at extremely high temperatures to create heavier nuclei.

• the process in which a nucleus splits into two or more fragments and releases neutrons and energy

• the process of adding radioactive material to a substance

• the process in which nuclear radiation is released from cosmic rays

Tags

NGSS.HS-PS1-8

To what does "radioactivity" refer?

• The process by which a charged electron is combined with a charged proton

• Energy emitted when an electron drops from a higher energy level to a lower energy level

• The number of nucleons in an element

• The process by which an unstable nucleus emts one or more particles of energy in the form of alpha, beta or gamma particles

Tags

NGSS.HS-PS1-8

1. The type of nuclear decay resulting in no change in mass, and is pure energy is _____________________________.

• alpha radiation

• beta radiation

• gamma radiation

• solar radiation

Tags

NGSS.HS-PS1-8

1. Isotopes are atoms of the same element but with differing numbers of ________________.

• protons

• neutrons

• electrons

• nucleons

A stable neutron-proton ratio is:

• 1.0

• 2.0

• none of the above

To what does "nuclear force" refer?

• the presence of neutrons which holds the nucleus together

• the balance of protons and electrons in a neutral atom

• none of the above

What happens to the nuclear force as the number of protons in an atom increases?

• it increases

• it decreases

• it stays the same